Started working on JP2 image, and updated amber model and unit tests to use SubType enums.
minor update.
minor update.
Merge pull request #68 from nla/gen-jp2

Gen jp2
Merge remote-tracking branch 'origin/master' into hr-tiny-little-optimisations

Conflicts:
	pom.xml
	test/amberdb/model/WorkTest.java
	test/amberdb/sql/AmberGraphDaoTest.java